"Cândido Rondon is by any measure the greatest tropical explorer in history. Between 1890 and 1930, he navigated scores of previously unmapped rivers, traversed untrodden mountain ranges, and hacked his way through jungles so inhospitable that even native peoples had avoided them--and led Theodore Roosevelt and his son, Kermit, on their celebrated "River of Doubt" journey in 1913-14. Upon leaving the Brazilian Army in 1930 with the rank of a two-star...

"Written by Museum botanist Dr Sandra Knapp, this compact little book explores Wallace's Amazonian expedition. He spent four years from 1848 - 1852 exploring the Upper Amazon Basin, a vast area of rainforest where few Europeans had ever been before, collecting thousands of specimens. The book describes Wallace's arduous journey, looks at his development as a naturalist and explains how the loss of most of his specimens during his journey home affected...

"A riveting journey down Theodore Roosevelt's "river of doubt" with a diverse crew of adventurers, scientists, and Indigenous leaders who shine light on the past, present, and future of a natural wonder. Sam Moses took part in the adventure of a lifetime when he, along with seventeen men and two women, embarked on the Rio Roosevelt Expedition. They would follow the former president's wake down five-hundred miles of extreme whitewater into the dark...